During a 20-minute press conference at LAPD Headquarters Beck said Dorner is believed to have killed Cal State Fullerton assistant basketball coach Monica Quan and her finance in Irvine Sunday, and ambushed two Riverside officers, killing one, this morning.

He is also believed to have fired on LAPD officers in Corona who were on a protection detail of one of the targets named in Dorner's manifesto.

Beck said Dorner is to be considered armed and extremely dangerous.

When asked if a man in a San Diego Hotel fitting Dorner's description was a suspect, Beck said "I have nothing I can release on that now."

Beck expressed his condolences to the families and the victims in the killing rampage.

"The Riverside cops had no chance to fight back."

Asked if he would publicly clear Dorner's name as his manifesto demanded, Beck said without hesitation, "It is not going to happen."

Asked what he would say to Dorner, Beck replied, "I would tell him to turn himself in. This has gone far enough. nobody else needs to die."

People with other tips can call LAPD Robbery Homicide detectives at 213-486-6860 or the 24-hour tip line at 877-LAPD-247 (527-3247).

Those who want to remain anonymous can call Crime Stoppers at 800-222-TIPS (8477) or text the organization by sending "LAPD" followed by a message to CRIMES (274637).